Re: Pascal 400kb Disk

[mjmahon@aol.com (Michael J. Mahon)]

In article <BA8FB392.705%vernet.jerome@wanadoo.fr>, Jerome Vernet
<vernet.jerome@wanadoo.fr> writes:

<snip>
>Last chance:
>- ADFS (thanks to David M. Potter, I send him an 800k Pascal Image disk).
>- Chameleon ???
>- trying to boot the Iigs with a 5.25 drive under Pascal 1.3

For Chameleon, go to:

ftp://ground.ecn.uiowa.edu/pub/apple2/apple8/Pgms/

Another program that can move Pascal files to ProDOS is the
Universal File Converter.  It can be found at:

ftp://ftp.apple.asimov.net/pub/apple_II/images/utility/disk_utils/

The issue of reading a single-sided 3.5" disk on a double-sided
drive is only an issue of software.  It is only necessary to avoid
reading sectors that are on the unused side of the disk, and then
to interpret the single-side sectors with appropriately translated
block numbers to correspond to its file system.

As Wayne has pointed out, GSOS can interpret single-sided
ProDOS 3.5" disks.  What you are looking for is a program that
can interpret a single-sided Pascal file system.

If all else fails, you can write such a program.  The job is made
much simpler because the Pascal file system stores files as
contiguous ranges of blocks--no index lists to worry about.

I believe that someone posted here a while back that the physical
sector ordering of a double-sided 3.5" disk was alternating sides
by cylinder, so every N sectors (N/2 blocks) should be on the
formatted side, and readable by any ProDOS block editor.
(Don't use GSOS if GSOS can't "mount" the disk.)

>Stay tuned !

I will--let us know how it goes!

-michael

Check out amazing quality 8-bit Apple sound on my
Home page:  http://members.aol.com/MJMahon/